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Re: New Testing




From: 	Charles Brush[SMTP:cfbrush-at-interport-dot-net]
Sent: 	Thursday, September 11, 1997 9:47 AM
To: 	Tesla List
Subject: 	Re: New Testing


Hi Ed,

Sorry to hear that you are still having problems with your system.  As
we've discussed in private email, my system is practically identical to
yours.  I too am running a 6" coil with a 5kVA pig (most of the time!),
225amp arc welder without resistors, Superior Powerstat, rotary gap (4 gap
series unit Ed Wingate just built for me), and RG213 HV feed cables.  I
just added a pair of .05uF 50kV pulse caps in series for .025uF tank
capacitance...same as you.  Our systems couldn't be much more similar.  My
tank circuit interconnects are a combination of heavy copper bussbar and #1
welding cable.   I am not running any static gaps in series with my rotary,
and the rotary fires very smoothly with the variac at only about 2/3 max.
At 14.4kV I would think that your .19" total gap would be fine.  Then
again, it couldn't hurt to just throw a jumper across those static gaps and
take them out of the circuit as a test.

Questions:

-Are you setup with the gap or the cap across the HV lines from the pig?

-Any chokes or bypass caps?  I seem to remember some in a photo of your
setup.  Have you tried taking these out to see if something is shorted?

-How is voltage out of the variac to the pig?

This must be frustrating, particularly after having waited so long for that
CP cap to come back.   It's a puzzle indeed.



Charles Brush
http://www.foundrygroup-dot-com
(no photos of the new setup & gap yet...soon...I'm in the process of
rebuilding my site!)